diff --git a/alv-lib/_osc.moon b/alv-lib/_osc.moon
index 43297df..265be9e 100644
--- a/alv-lib/_osc.moon
+++ b/alv-lib/_osc.moon
@@ -2,21 +2,19 @@
 import opairs from require 'alv.util'
 import T, Array, Struct from require 'alv.base'
 
-add_item = (message, type, val) ->
+add_item = (message, type, val, use_arrays=false) ->
   switch type.__class
     when Array
-      -- message\add '['
+      message\add '[' if use_arrays
       for i=1,type.size
-        add_item message, type.type, val[i]
-      -- message\add ']'
+        add_item message, type.type, val[i], use_arrays
+      message\add ']' if use_arrays
     when Struct
-      -- message\add '['
+      message\add '[' if use_arrays
       for key, subtype in opairs type.types
-        -- message\add '['
         message\add 's', key
-        add_item message, subtype, val[key]
-        -- message\add ']'
-      -- message\add ']'
+        add_item message, subtype, val[key], use_arrays
+      message\add ']' if use_arrays
     else
       ts = switch type
         when T.num then 'f'
diff --git a/alv-lib/osc.moon b/alv-lib/osc.moon
index b50d9f8..8c93b07 100644
--- a/alv-lib/osc.moon
+++ b/alv-lib/osc.moon
@@ -66,6 +66,45 @@
         add_item msg, @inputs[i]\type!, args[i]
       socket\send msg.pack msg.content
 
+send_arr = Constant.meta
+  meta:
+    name: 'send-arr'
+    summary: "Send an OSC message using arrays."
+    examples: { '(osc/send [socket] path val…)' }
+    description: "Sends an OSC message to `path` with `val…` as arguments.
+
+- `socket` should be a `udp/socket` value. This argument can be omitted and the
+  value be passed as a dynamic definition in `*sock*` instead.
+- `path` is the OSC path to send the message to. It should be a string-value.
+- the arguments can be any type:
+  - `num` will be sent as `f`
+  - `str` will be sent as `s`
+  - `bool` will be sent as `T`/`F`
+  - `bang` will be sent as `T`
+  - arrays will be sent as a series of values surrounded by `[…]`
+  - structs will be sent as a series of key (`s`)/value tuples surrounded by `[…]`
+
+This is a pure op, so between the values at most one !-stream input is allowed."
+
+  value: class extends PureOp
+    pattern: any!^0
+
+    full_pattern = -sig['udp/socket'] + sig.str + any!^0
+    setup: (inputs, scope) =>
+      { socket, path, values } = full_pattern\match inputs
+      super values, scope, {
+        socket: Input.cold socket or scope\get '*sock*'
+        path:   Input.cold path
+      }
+
+    tick: =>
+      args = @unwrap_all!
+      { :socket, :path } = args
+      msg = new_message path
+      for i=1,#args
+        add_item msg, @inputs[i]\type!, args[i], true
+      socket\send msg.pack msg.content
+
 Constant.meta
   meta:
     name: 'osc'